Not quite what i expected - Armaspec Rhino R-23 Tactical Magwell Grip and Funnel

Bought for an AR micro pistol to have a better two hand forward grip point. I'm using 10 round Magpul mags and when these are in place the ten rounder is way up inside the funnel....way too difficult to insert. Okay, I'll cut the bottom 1.5 grip points off. Nope. The front of this part is hollow and cutting the bottom even with the bottom two fastener holes leaves open hollow spaces that look terrible. I didnt see the hollow insude as there was no picture of it, nor of how wide it is at the bottom of the mag funnel. Lastly, with this clamped in place it blocks half the serial number. If the firearm is an SBR or a travel gun, having that number visible is important. As such, I will not use this. I wont waste miney returning it but might use it on another gun as the funnel works nicely.